390689005 has 32 divisors (see below), whose sum is σ = 550598400. Its totient is φ = 266011200.

The previous prime is 390688981. The next prime is 390689011. The reversal of 390689005 is 500986093.

It is not a de Polignac number, because 390689005 - 2¹¹ = 390686957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268530 + ... + 269980.

It is an arithmetic number, because the mean of its divisors is an integer number (17206200).

Almost surely, 2^390689005 is an apocalyptic number.

390689005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

390689005 is a deficient number, since it is larger than the sum of its proper divisors (159909395).

390689005 is a wasteful number, since it uses less digits than its factorization.

390689005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 1620 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 390689005 is about 19765.8545223828. The cubic root of 390689005 is about 731.0443580806.

The spelling of 390689005 in words is "three hundred ninety million, six hundred eighty-nine thousand, five".